Chemistry · Enthalpies of bond dissociation, combustion, formation, atomization, sublimation, phase transition, hydration, ionization and solution
When water is added to the reaction is exothermic. It is because of formation of
When water is added to \( H_{2} S O_{4}, \) the reaction is exothermic. It is because of formation of:
- A. viscous nature of \( H_{2} S O_{4} \)
- B. hydrates of \( H_{2} S O_{4} \)
- C. corrosive nature of \( H_{2} S O_{4} \)
- D. none of the above
Step-by-step solution
When water is added to concentrated sulfuric acid, the formation of hydrates (such as H2SO4·H2O and H2SO4·2H2O) releases a large amount of heat, making the process exothermic. The viscous nature is a result of hydrogen bonding but not the cause of the heat release. Corrosive nature is unrelated to the exothermicity.
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